Just looked for n810 official price tag in the US at launch (end November 2007): $479 + tax. As reported here:

http://www.slashgear.com/nokia-shipp...inally-208621/

or here:

http://news.softpedia.com/news/Nokia...es-71301.shtml

If I remember correctly, soon after some retailers offered the N810 in a price range of $410-430.